Crawler pin bush crushing test device

Abstract

The utility model provides a track pin bush crushing test device which is used in cooperation with an electronic universal testing machine, pressure applied by the electronic universal testing machine is transmitted to a detected pin bush through the track pin bush crushing test device, and finally the detected pin bush is crushed. Comprising a guide sleeve, a hollow channel is formed in the middle of the guide sleeve, a lower pressing block and an upper pressing block are sequentially arranged in the hollow channel of the guide sleeve in the axial direction, a pin bush to be detected is placed between the lower pressing block and the upper pressing block, the upper pressing block is in sliding connection with the guide sleeve, and a pin bush positioning groove is formed in the top of the lower pressing block. Pressure applied by the electronic universal testing machine is transmitted to the pin bush to be detected through the upper pressing block, so that the pin bush to be detected is stressed and deformed.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing and manufacturing, and particularly relates to a track pin sleeve crushing test device. Background Art

[0002] As one of the core components of the track assembly, the track pin bushing is the support part of the walking mechanism of the engineering machinery and is also a wear-prone component. It is not only required to have high wear resistance, but also good impact toughness and fatigue resistance. The track pin bushing generally goes through the processes of product design, material selection and component design, smelting and molding process control, machining and heat treatment process formulation, etc. Each process involved seriously affects the product quality and must be strictly controlled.

[0003] In the manufacturing process of the pin sleeve, the existing conditions in the industry can easily detect the hardness and metallographic structure of the pin sleeve using a hardness tester and a metallographic microscope, but the bearing capacity and product stability of the pin sleeve under actual service conditions cannot be evaluated, especially the toughness and fatigue strength after structural design, material selection, and hot processing. Therefore, it is extremely important to design a device to evaluate the bearing capacity and stability of the pin sleeve during use. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a track pin sleeve crushing test device. The purpose of the utility model is to solve the problem that the bearing capacity and product stability of the pin sleeve under actual working conditions cannot be evaluated.

[0005] To achieve the above-mentioned purpose, the utility model provides a track pin sleeve crushing test device, including a guide sleeve, a hollow channel is provided in the middle of the guide sleeve, a lower pressure block and an upper pressure block are provided in the hollow channel of the guide sleeve in sequence along the axial direction, the upper pressure block is slidably connected to the guide sleeve, a pin sleeve positioning groove is provided on the top of the lower pressure block, and the pin sleeve to be tested is placed between the lower pressure block and the upper pressure block.

[0006] Furthermore, an opening is provided on the top of the upper pressing block, which facilitates the operator to replace the upper pressing block, thereby quickly disassembling and replacing the track pin sleeve crushing test device.

[0007] Furthermore, there is a clearance fit between the upper pressing block and the inner wall of the guide sleeve, thereby achieving a sliding connection.

[0008] Furthermore, the positioning groove on the top of the lower pressing block is a V-shaped groove, and the slope of the V-shaped groove is 45°.

[0009] Furthermore, a boss is provided on the top of the lower pressing block to limit the downward movement of the upper pressing block.

[0010] Furthermore, the lower pressing block and the guide sleeve are slidably connected by a clearance fit.

[0011] Furthermore, the track pin sleeve crushing test device is made of H13 hot working die steel.

[0012] Compared with the prior art, the track pin sleeve crushing test device of the utility model mainly has the following advantages:

[0013] 1. The track pin sleeve crushing test device of the utility model can simulate the continuous force situation of the pin sleeve during operation, which is closer to the force borne by the pin sleeve in the track assembly, and can quickly detect the ability of the pin sleeve to resist deformation and obtain the crushing strength of the pin sleeve material;

[0014] 2. The track pin sleeve crushing test device of the utility model adopts the wrapping design of the guide sleeve on the upper and lower pressure blocks to improve the stability and safety of the test process. By reasonably designing the clearance fit dimensions between the lower pressure block, the upper pressure block and the guide sleeve, the contact between the components is guaranteed to be stable, which can effectively prevent the unstable clearance between the components from causing excessive test data errors, unstable test process, unreliable test results, etc.

[0015] 3. The top of the lower pressing block of the track pin sleeve crushing test device of the utility model is provided with a positioning groove and a boss to ensure the accuracy of positioning of the sample and the upper pressing block, which greatly improves the stability and reliability of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the track pin sleeve crushing device of the utility model;

[0017] Figure 2 It is a test principle diagram of the crawler pin sleeve crushing device of the utility model;

[0018] Figure 3 It is the test result output diagram of the track pin sleeve crushing device of the utility model;

[0019] In the figure: 1, lower pressing block; 11, boss; 12, positioning groove; 2, guide sleeve; 3, upper pressing block; 31, opening. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1As shown, the utility model provides a track pin sleeve crushing test device, which is used in conjunction with a test power device. In this embodiment, the test power device is preferably an electronic universal testing machine. The pressure applied by the electronic universal testing machine is transmitted to the pin sleeve to be tested through the track pin sleeve crushing test device. The track pin sleeve crushing test device includes a tubular guide sleeve 2, a hollow channel is provided in the middle of the guide sleeve 2, and a lower pressing block 1 and an upper pressing block 3 are sequentially provided in the hollow channel of the guide sleeve 2 along the axial direction. The pin sleeve to be tested is placed between the lower pressing block 1 and the upper pressing block 3. The wrapping design of the guide sleeve 2 to the upper pressing block 3 and the lower pressing block 1 improves the stability and safety of the test process. The lower pressing block 1 and the upper pressing block 3 are both matched with the inner wall of the guide sleeve 2 to achieve sliding connection. By reasonably designing the clearance matching size between the lower pressing block 1, the upper pressing block 3 and the guide sleeve 2, the contact between the components is guaranteed to be stable, which can effectively prevent the unstable gap between the components from causing excessive error in the test data, unstable test process, unreliable test results, etc.

[0022] Specifically, the track pin sleeve crushing test device of this embodiment is made of H13 hot working die steel, and an opening 3 is provided on the top of the upper pressing block 3, which is convenient for the operator to insert the screw into the upper pressing block 3 and take the upper pressing block 3 through the screw, making the replacement of the track pin sleeve crushing test device more convenient. A positioning groove 12 and a boss 11 are provided on the top of the lower pressing block 1. The positioning groove 12 is preferably a V-shaped groove, and the slope of the V-shaped groove is 45°; the boss 11 on the top of the lower pressing block 1 plays a role in limiting the downward movement of the upper pressing block 3; the boss 11 and the positioning groove 12 ensure the accuracy of the positioning of the sample and the upper pressing block 1, which greatly improves the stability and reliability of the test process.

[0023] In this embodiment, the electronic universal testing machine is used as the pressure output source and the crush test result output device; its loading rate is 2KN / s. In addition, the tested pin sleeve is directly wire-cut on the finished pin sleeve to obtain a circular ring sample, the sampling width is 15mm, and the number of samples should be greater than or equal to 3.

[0024] like Figure 2 As shown, during the test, a lower pressing block 1 is placed on the platform of the electronic universal testing machine, and then the pin sleeve to be tested is placed in the positioning groove 12 of the lower pressing block 1. The pin sleeve to be tested must be placed in the center of the positioning groove 12 to ensure that the crushed specimen is subjected to uniform force. Then the guide sleeve 2 is sleeved on the outer periphery of the lower pressing block 1, and finally the upper pressing block 3 is inserted into the guide sleeve 2 and pressed on the pin sleeve to be tested. The electronic universal testing machine pushes the upper pressing block 3 to move downward until it rests on the boss 11 on the top of the lower pressing block 1. The pressure applied by the electronic universal testing machine is transmitted to the pin sleeve to be tested through the upper pressing block 3, so that the pin sleeve to be tested is deformed by force and finally crushed.

[0025] The track pin bushing crushing test device can simulate the continuous stress situation of the pin bushing during operation, which is closer to the force that the pin bushing bears in the track assembly. It can quickly detect the pin bushing's ability to resist deformation and obtain the crushing strength of the pin bushing material, thereby providing feedback on product stability. Finally, the electronic universal testing machine control interface outputs a curve of the relationship between the test force and the deformation function, which can infer the strength and toughness of the pin bushing material under continuous load, and determine whether the pin bushing material or the pin bushing manufacturing process meets the use requirements, thereby evaluating the bearing capacity and stability of the pin bushing in actual applications. It can provide a theoretical basis for process personnel to select raw materials for the pin bushing, product design, and the formulation of subsequent heat treatment processes, effectively control product quality, and thus effectively improve product stability.

[0026] like Figure 3 As shown, the test data of the pin sleeve test force and radial deformation will be displayed on the electronic universal testing machine, and the test results will be analyzed and processed to obtain the ability of the pin sleeve to resist deformation during the crushing process of different product designs and processes. In addition, the stability of product quality can be compared based on multiple crushing tests of the same pin sleeve. Furthermore, technicians can optimize and improve the pin sleeve material, structural design, and heat treatment process. Figure 3 As shown in a, the pin sleeve manufactured by process 1 shows unstable crushing test results, and the crushing forces of the three sets of data vary greatly; Figure 3 As shown in b, the pin sleeve manufactured by process 2 has a more significant ability to resist deformation under continuous loading, and the three groups of test data are more stable.

[0027] It is understood that what is described in the specific implementation is only one embodiment of the present invention, and those skilled in the art may make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A track pin bushing crushing test device, characterized in that: The invention comprises a guide sleeve (2), wherein a hollow channel is provided in the middle of the guide sleeve (2), a lower pressing block (1) and an upper pressing block (3) are provided in the hollow channel of the guide sleeve (2) in sequence along the axial direction, the upper pressing block (3) is slidably connected to the guide sleeve (2), a pin sleeve positioning groove (12) is provided at the top of the lower pressing block (1), and the pin sleeve to be detected is placed between the lower pressing block (1) and the upper pressing block (3).

2. The track pin bushing crushing test device according to claim 1, characterized in that: The top of the upper pressing block (3) is provided with an opening (31), which facilitates an operator to replace the upper pressing block (3), thereby quickly disassembling and replacing the track pin sleeve crushing test device.

3. The track pin bushing crushing test device according to claim 1, characterized in that: There is a clearance fit between the upper pressing block (3) and the inner wall of the guide sleeve (2), thereby achieving a sliding connection.

4. The track pin bushing crushing test device according to claim 1, characterized in that: The positioning groove (12) on the top of the lower pressing block (1) is a V-shaped groove, and the slope of the V-shaped groove is 45 degrees.

5. The track pin bushing crushing test device according to claim 4, characterized in that: The top of the lower pressing block (1) is also provided with a boss (11) for limiting the downward movement of the upper pressing block (3).

6. The track pin bushing crushing test device according to claim 1, characterized in that: The lower pressing block (1) and the guide sleeve (2) are connected in a sliding manner by means of clearance fit.

7. The track pin bushing crushing test device according to any one of claims 1 to 6, characterized in that: The track pin sleeve crushing test device is made of H13 hot working die steel.

Images